From 5ea22a325c069fe497b2dc8a73d4de69fd8cc27b Mon Sep 17 00:00:00 2001
From: Sebastian <sebasjm@gmail.com>
Date: Fri, 14 Apr 2023 14:07:15 -0300
Subject: using new localStorage api, pageState => settings, notifcation using
 observer api

---
 packages/demobank-ui/src/hooks/settings.ts | 49 ++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 packages/demobank-ui/src/hooks/settings.ts

(limited to 'packages/demobank-ui/src/hooks/settings.ts')

diff --git a/packages/demobank-ui/src/hooks/settings.ts b/packages/demobank-ui/src/hooks/settings.ts
new file mode 100644
index 000000000..5115f9959
--- /dev/null
+++ b/packages/demobank-ui/src/hooks/settings.ts
@@ -0,0 +1,49 @@
+/*
+ This file is part of GNU Taler
+ (C) 2022 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+import { useLocalStorage } from "@gnu-taler/web-util/lib/index.browser";
+
+interface Settings {
+  currentWithdrawalOperationId: string | undefined;
+}
+
+const defaultSettings: Settings = {
+  currentWithdrawalOperationId: undefined,
+};
+
+function parse_json_or_undefined<T>(str: string | undefined): T | undefined {
+  if (str === undefined) return undefined;
+  try {
+    return JSON.parse(str);
+  } catch {
+    return undefined;
+  }
+}
+
+export function useSettings(): [
+  Readonly<Settings>,
+  <T extends keyof Settings>(key: T, value: Settings[T]) => void,
+] {
+  const { value, update } = useLocalStorage("demobank-settings");
+
+  const parsed: Settings = parse_json_or_undefined(value) ?? defaultSettings;
+  function updateField<T extends keyof Settings>(k: T, v: Settings[T]) {
+    const newValue = { ...parsed, [k]: v };
+    const json = JSON.stringify(newValue);
+    update(json);
+  }
+  return [parsed, updateField];
+}
-- 
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